スピーキングチャレンジ 携帯はどこからくるのか？　Where does your phone come from?

今日のスピーキングチャレンジ

Rather than digging in the ground for the elements needed for new handsets, it makes sense to extract them from old phones. But only about 10% of handsets are recycled now. So recycle your phone if you get a new one this year. Why? It is, you might say, elementary.